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<br />C"~ <br /> <br />.,..... <br />:.""." <br />'~...; ~.; <br /> <br />~ <br /> <br />N <br />~ <br /> <br />10 <br /> <br />compact is that Colorado releases are measured at John <br /> <br />Martin Dam while Kansas releases are measured at the <br /> <br />Colorado-Kansas state1ine, thus, allowing return flow <br /> <br />and other accretions in the reach between John Martin <br /> <br />Dam and the stateline to be credited to the release for <br /> <br />Kansas. <br /> <br />Operation governed by the compact began with <br /> <br />compact year 1949 on November 1, 1948. Table 13 shows <br /> <br />the river flow into John Martin Reservoir from the <br /> <br />Arkansas and Purgatoire Rivers. River flow into <br /> <br />the reservoir during the 23-year study period, 1949-71, <br /> <br />averaged about 179,000 acre-feet. Of the total, an <br /> <br />average of 24,000 acre-feet entered during the winter <br /> <br />storage season. An average of about 81,000 acre-feet <br /> <br />entered during June and July, which is nearly half of <br /> <br />the annual total and a result of snowmelt in the high <br /> <br />elevations of the upper Arkansas River basin. Table 2 <br /> <br />shows those months during the irrigation seasons that <br /> <br />the conservation storage was not sufficient to meet <br /> <br />the demands; i.e., the cOnservation pool was empty at <br /> <br />some time during the month. Adequate water supplies <br /> <br />were available during only six years of the period. <br />